US4524996A - Corrosion-resistant tube assembly - Google Patents
Corrosion-resistant tube assembly Download PDFInfo
- Publication number
- US4524996A US4524996A US06/434,652 US43465282A US4524996A US 4524996 A US4524996 A US 4524996A US 43465282 A US43465282 A US 43465282A US 4524996 A US4524996 A US 4524996A
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- United States
- Prior art keywords
- corrosion
- tube
- sleeve
- resistant
- assembly
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- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
- F16L58/182—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for screw-threaded joints
Definitions
- the present invention relates to a metallic tube assembly having corrosion-resistant joints.
- this invention relates to metallic tube assemblies having all inside surfaces and joints comprising corrosion-resistant material.
- the present invention relates to carbon or low-alloy steel oil well tubing having a corrosion-resistant liner and corrosion-resistant coupling device to provide a tube assembly wherein all inside surfaces are of corrosion-resistant material.
- carbon steel tubing is used in drilling oil and gas wells.
- alternative materials have been proposed in order to withstand the severe corrosive environments and conditions.
- a prior approach of providing inhibitors in carbon steel poses logistic problems, requires auxiliary handling and treatment facilities, is expensive and may not be economical for certain severe corrosive conditions experienced in many sour wells.
- Another alternative would be to completely convert from carbon steel tubing to various types of stainless steel tubing depending upon the severity of the conditions. Such an approach would be expensive because of the tonnage of stainless steel tubing required for deep wells.
- U.S. Pat. No. 4,366,971 issued Jan. 4, 1983, by the common Assignee of the present invention, discloses a novel tube assembly which provides that all of the inside surfaces of the assembly are resistant to corrosive attack and minimizes the cost of providing an acceptable corrosion-resistant tubing assembly.
- the patent disclosure pertains to providing a weld overlay or metallurgically-bonded portion of corrosion-resistant material on the ends of the tubes at the joints.
- U.S. Pat. No. 3,336,054 discloses a well pipe carrying a corrosion-resistant metal liner and threaded joints for interconnecting well pipe by threaded pin and box members.
- the tubing may include a groove for receiving a seal member between a sleeve and an adjacent tube.
- U.S. Pat. No. 3,307,860 relates to a joint for well pipe having a tubular coupling and a pressure actuated seal of a deformable ring between the coupling and tubing.
- the assembly should include typical carbon steel or low-alloy steel tubes having a corrosion-resistant lining, yet provide expansible joint assemblies with all inside surfaces being of corrosion-resistant materials.
- Such tubing should also be compatible with carbon steel casing into which the tubes are inserted during service to avoid galvanic corrosion problems.
- a corrosion-resistant tube assembly having mechanically-joined tubes which provide an assembly having all corrosion-resistant inside surfaces.
- a corrosion-resistant component for a corrosion-resistant tube assembly.
- the component includes a corrosion-susceptible metal tube and a sleeve of corrosion-resistant metal mechanically joined to the tube for protecting the end portions of the tube.
- the sleeve includes a first portion terminating in a ring-shaped second portion. The first portion annularly extends about a surface of a tube and is mechanically joined thereto. A second portion of the sleeve overlies the annular end surfaces of the corrosion-susceptible tube.
- the component includes a corrosion-resistant liner for the tube which is sealed with an inside surface of a portion of the sleeve about the circumference.
- a corrosion-resistant annular expansion-sealing ring is fixed to the end surface of the liner and is positioned at a location near the end surface of the tube and inside surface of the second portion of the sleeve to provide an expansion joint between the liner and tubing.
- a corrosion-resistant tube assembly having a corrosion-resistant component is also provided such that tubes are mechanically and threadably joined by the sleeves.
- the assembly has all inside surfaces of the tube assembly of corrosion-resistant material.
- FIG. 1 is a partial cross-sectional view of a tube assembly of the present invention
- FIG. 2 is a partially cross-sectional view of an alternative tube assembly of the present invention
- FIGS. 3 and 4 are cross-sectional views of alternative joints of the tube assembly of the present invention.
- FIG. 5 is a cross-sectional view of an alternative embodiment of the present invention.
- the tube assembly 10 of the present invention is provided with corrosion-resistant surfaces in the interior thereof. As shown in FIGS. 1 and 2, a significant portion of the tube assembly is comprised of corrosion-susceptible metal tubing 12 which is not exposed to corrosives in the joint assembly 10. Therefore, conventional and various grades of low-cost carbon steels, such as C75 or C80, or other low-alloy steels which are corrosive-susceptible materials, can be used as tubing 12 in the assembly 10.
- the corrosion-susceptible metal tubing 12 has an outside surface 14, an inside surface 16 and end surfaces 18 and 20.
- Tubes 12 of various lengths, diameters, gage and shapes, including curved tubes, tubes having T-shapes, Y-shapes and other junctions, as well as tubes having reducing diameters along the length thereof, are contemplated by the assembly of the present invention.
- the end portions 22 and 24 must be isolated or covered with a corrosion-resistant metal, such as stainless steel, at least along a portion of the outside surface 14, along inside surface 16, and across the annular end surfaces 18 and 20 of the corrosion-susceptible tube 12.
- a corrosion-resistant metal such as stainless steel
- isolation is provided by a metallurgically-bonded weld overlay of corrosion-resistant metal.
- isolation is provided by metallurgically bonding or mechanically connecting a sleeve of corrosion-resistant material to the end portions of the corrosion-susceptible tubing while permitting joint expansion between the liner and tube as explained in detail below.
- the present invention is applicable to pin and box arrangements and coupler joint assemblies.
- FIG. 1 illustrates a partial cross-sectional view of a tube assembly of the present invention.
- Two tubes 12 are each provided with substantially identical sleeves 26 on the end thereof to facilitate mechanically joining the two tubes.
- overlay sleeve 26 has a first and second portion.
- the first portion 28 may be an annular or ring-shaped portion having an inside and outside surface for contacting and engaging tubing 12 and metal connector or coupler 36, respectively.
- First portion 28 terminates at one end in a second portion 29, which is an annular or ring-shaped portion having a diameter smaller than the inside diameter of the first portion 28.
- the inside diameter of second portion 29 of sleeve 26 is smaller than the inside diameter of first portion 28.
- the sleeve 26 is comprised of any corrosion-resistant alloy, preferably stainless steel, or other material such as nickel base, cobalt base alloys, chromium-nickel-cobalt-molybdenum alloys, titanium or titanium alloys.
- any corrosion-resistant alloy preferably stainless steel, or other material such as nickel base, cobalt base alloys, chromium-nickel-cobalt-molybdenum alloys, titanium or titanium alloys.
- corrosion-resistant materials may be selected for the sleeve, depending upon the particular corrosion environment and the required strength of the sleeve.
- the sleeve 26 typically fits over the end portion of the tubing with close tolerance.
- the sleeve 26 is threaded onto the end portion of the tubing.
- First portion 28 of sleeve 26 has threads on the inside surface to be threadably engaged with the outer surface of tube 12.
- First portion 28 of second sleeve 26 has threads 32 on the outside surface to be threadably engaged with the inside surface of the metal connector 36.
- the thread parameters should be chosen with respect to the service conditions, sealing requirements and strength requirements for the tube assembly of the present invention.
- the depth of such threads 32 must not penetrate the sleeve 26 to expose any of the outside surface 14 of the corrosion-susceptible pipe 12, or adversely impact on the integrity and strength of the sleeve 26.
- sleeve 26 may be slip fit or shrink fit by known techniques over the end portions of the tubing and only have threads 32 on the outside surface.
- overlay sleeve 26 includes an annular notch or groove 70 on an inside surface adjacent the peripheral end surface or tube 12 for receiving an annular expansion ring 67 to provide an expansion joint 66.
- Ring 67 is located between the end of liner 34 and overlay sleeve 26 on the inside surface of sleeve 26 to isolate tube 12 from the corrosive environment of the tube assembly.
- a corrosion-resistant metallic liner 34 having inside, outside and end surfaces is provided within the corrosive-susceptible tube 12.
- Liner 34 may be a separate element which is disposed in and along the entire length of the tube 12.
- such liner 34 has a gage of about 0.005 to 0.100 inch, or more preferably within the range of from 0.010 to 0.040 inch.
- Most preferred liners for oil well applications have a gage of about 0.015 to 0.030 inch.
- the liner 34 may be coextruded, explosively bonded or otherwise metallurgically bonded to the inside surface of the tube. In embodiments where the liner 34 is coextruded or bonded to the tube 12, the need of an expansion joint between the liner and tube is minimal for the differential expansion is nil.
- the liner 34 preferably extends near the end surfaces 18 and 20 of the tube 12.
- liner 34 is shown to extend about to the end surface 18 of one tube 12 or beyond end surfaces 18 and 20 of tubes 12, respectively.
- liner 34 extends to a position adjacent to an inside surface of sleeve 26.
- Liner 34 may extend to a position adjacent annular groove 70 on an inside surface of second portion 29 of sleeve 26 or, alternatively, to a position adjacent an inside surface of second portion 29 of sleeve 26 as shown in FIG. 2.
- the embodiment of FIG. 2 may be used to facilitate flow of fluids through joint assembly 10 by avoiding direct flow contact with annular ring 67.
- the end portion of the liner 34 may comprise a corrosion-resistant expansion joint 66 in groove 72 of tube 12 to protect the assembly from the corrosive environment yet permit slight expansion and contraction of the assembly without adversely affecting such corrosion resistance.
- Annular notch or groove 72 is located on the inside surface of tube 12 at the end portion for receiving an annular expansion-sealing ring 67 to provide an expansion joint 66.
- Joint 66 may include a resilient and corrosive-resistant material, such as rubbers, elastomers, metal, plastics or other suitable material, interposed between liner 34 and second portion 29 of sleeve 26 to isolate tube 12.
- Ring 67 is located between the end of liner 34 and overlay sleeve 26 on the inside surface of tube 12 to isolate tube 12 from the corrosive environment of the interior of the tube assembly.
- ring 67 is secured or fixed to the end of liner 34 and contacts overlay sleeve 26. More preferably, ring 67 is fixed to liner 34 and overlay sleeve 26 as shown in FIG. 3 at locations 74 and 75.
- a notch 70 or 72 may be provided on both the inside surface of overlay sleeve 26, as shown in FIG. 1, and on the end portion of tube 12, as shown in FIG. 2.
- the second portion 29 of sleeve 26, which is adjacent the annular end surface 18 or 20 of the corrosion-susceptible tube 12, may include a sealing gasket 64 which does not form an expansion joint. Without the need for welding, the embodiment assures that all inside surfaces of the tube assembly comprise corrosion-resistant material.
- a corrosion-resistant annular gasket 64 such as a stainless steel metal gasket, may be used at the junction of the second portion 29 of sleeve 26 and the liner 34 to provide such seal, as shown in FIG. 4. Gasket 64 may completely overlie end portions of tube 12 and liner 34 and be held in place by overlaying second portion of sleeve 26.
- FIG. 5 illustrates another embodiment wherein it may be desired to weld an end portion 60 of the first portion 28 of sleeve 26 to the outside surface 14 of the corrosion-susceptible tube 12.
- Such weld 62 which may be continuous or spot welded around the circumference of the tube, may assist in maintaining the sleeve 26 in place.
- Such weld 62 may be preferred in cases where the sleeve is force fit, rather than threaded, onto the tube 12.
- the end portions of the lined tubes 12 may be made corrosion resistant as described above, so that two or more longitudinally-aligned end portions of such tube 12 may be connected, as shown in FIGS. 2 and 3, such tubes may be attached by threading an appropriate connector 36 onto the threads 32 provided along the outside surface of the sleeve 26 on the aligned tubes.
- the inside surface 38 of the connector 36 must be comprised of a corrosion-resistant material at least at the junction of the two longitudinally-aligned end portions of the tubes 12.
- the connector may be comprised totally of a corrosion-resistant material, such as stainless steel.
- FIG. 1 a corrosion-resistant material
- the inside surface 38 may be comprised of a bonded coating or overlay 40 of corrosion-resistant material, such as stainless steel.
- a bonded coating or overlay 40 of corrosion-resistant material, such as stainless steel.
- the coating or overlay 40 should extend at least 1/4 inch, and preferably at least 1/2 inch, into the threaded area of the sleeve 26.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US06/434,652 US4524996A (en) | 1982-10-15 | 1982-10-15 | Corrosion-resistant tube assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US06/434,652 US4524996A (en) | 1982-10-15 | 1982-10-15 | Corrosion-resistant tube assembly |
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US4524996A true US4524996A (en) | 1985-06-25 |
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US06/434,652 Expired - Fee Related US4524996A (en) | 1982-10-15 | 1982-10-15 | Corrosion-resistant tube assembly |
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Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5028081A (en) * | 1987-06-05 | 1991-07-02 | Societe Nationale Elf Aquitaine | Connection for pipes of composite materials |
US5437086A (en) * | 1993-09-09 | 1995-08-01 | Murphree; Pat D. | Method of fabricating a bi-metal pipe section |
US5447339A (en) * | 1991-02-26 | 1995-09-05 | Philippe Marchal | Pipe for carrying fluids, particularly hydrocarbons |
US5653477A (en) * | 1994-12-14 | 1997-08-05 | Rohrback Cosasco Systems, Inc. | High pressure access fitting and method |
US5660211A (en) * | 1992-01-06 | 1997-08-26 | Sumitomo Metal Industries | Galvanic corrosion resistant insulating pipe having excellent film adhesion |
US5906400A (en) * | 1997-05-12 | 1999-05-25 | John Gandy Corporation | Galvanic corrosion protection system |
US6042153A (en) * | 1998-02-25 | 2000-03-28 | Grant Prideco, Inc. | Threaded connection for internally clad pipe |
US6073332A (en) * | 1998-03-09 | 2000-06-13 | Turner; William C. | Corrosion resistant tubular system and method of manufacture thereof |
US6863313B1 (en) | 1998-02-25 | 2005-03-08 | Grant Prideco, L.P. | Threaded connection for internally clad pipe |
US20050212283A1 (en) * | 2004-03-26 | 2005-09-29 | Honeywell International Inc. | Low profile tension style flexible joint |
US20060071473A1 (en) * | 2004-10-05 | 2006-04-06 | Sivley Robert S Iv | Helical groove for a tubular connection |
US20070181296A1 (en) * | 2006-02-08 | 2007-08-09 | David Hall | Self-expandable Cylinder in a Downhole Tool |
US20070187078A1 (en) * | 2005-12-21 | 2007-08-16 | Exxonmobil Research And Engineering Company | Insert and method for reducing fouling in a process stream |
US20110146049A1 (en) * | 2009-11-30 | 2011-06-23 | Howard Hagiya | Grooved-End Rubber Expansion Joint |
US20110206505A1 (en) * | 2010-02-19 | 2011-08-25 | Dresser-Rand Company | Welded structural flats on cases to eliminate nozzles |
US20110232290A1 (en) * | 2010-03-24 | 2011-09-29 | Dresser-Rand Company | Press-fitting corrosion resistant liners in nozzles and casings |
EP2823295A4 (en) * | 2012-03-05 | 2015-11-04 | Waters Technologies Corp | Corrosion protection in tubing used in chromatography |
US20230194027A1 (en) * | 2021-12-16 | 2023-06-22 | B. & E. Manufacturing Co., Inc. | Dynamic Bellows Fluid Fitting |
Citations (22)
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US1306690A (en) * | 1919-06-17 | Alexander edwin gillespie | ||
US1827437A (en) * | 1929-12-07 | 1931-10-13 | Alfred H Pascoe | Method of making reenforced drill pipe casings |
US1840305A (en) * | 1928-07-13 | 1932-01-12 | Smith Corp A O | Oil refining still |
US1989614A (en) * | 1933-10-05 | 1935-01-29 | Texas Co | Corrosion resistant liner for tubular articles |
US2201862A (en) * | 1938-03-26 | 1940-05-21 | Heisterkamp Alex | Pipe coupling |
US2216033A (en) * | 1938-06-01 | 1940-09-24 | Kellogg M W Co | Method of forming lined connectors |
US2240021A (en) * | 1935-08-16 | 1941-04-29 | United States Steel Corp | Method of preventing wedge and contact corrosion of metals and alloys |
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US2303778A (en) * | 1941-02-06 | 1942-12-01 | Int Nickel Co | Soil pipe |
FR998495A (en) * | 1945-10-13 | 1952-01-18 | Stup Procedes Freyssinet | Pipe joints, particularly suitable for concrete pipes |
US2739828A (en) * | 1949-12-06 | 1956-03-27 | Flexonics Corp | Pipe connector with flexible material joint |
US2919936A (en) * | 1956-01-03 | 1960-01-05 | Curtiss Wright Corp | Metallic lined pipe coupling having a metallic seal |
US3020068A (en) * | 1959-02-18 | 1962-02-06 | Victaulic Co Of America | Coupling of lined pipe and methods |
US3077661A (en) * | 1958-03-28 | 1963-02-19 | Howard A Fromson | Method of making composite seamless tubing |
US3192612A (en) * | 1963-04-05 | 1965-07-06 | Phillips Petroleum Co | Method of constructing plastic-lined conduit |
US3307860A (en) * | 1965-01-15 | 1967-03-07 | Mobil Oil Corp | Joint for liner-carrying well pipe |
US3336054A (en) * | 1965-01-15 | 1967-08-15 | Mobil Oil Corp | Liner-carrying well pipe and joint |
US3758361A (en) * | 1970-11-16 | 1973-09-11 | J Hunter | Process for lining pipe joints |
US3843170A (en) * | 1971-07-09 | 1974-10-22 | L Bagnulo | Joints for conduits having a continuous corrosion-resistant lining |
US4026583A (en) * | 1975-04-28 | 1977-05-31 | Hydril Company | Stainless steel liner in oil well pipe |
US4288105A (en) * | 1979-02-21 | 1981-09-08 | Resistoflex Corporation | Pipe union with both pre-load dependent and independent seals |
US4366971A (en) * | 1980-09-17 | 1983-01-04 | Allegheny Ludlum Steel Corporation | Corrosion resistant tube assembly |
-
1982
- 1982-10-15 US US06/434,652 patent/US4524996A/en not_active Expired - Fee Related
Patent Citations (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1306690A (en) * | 1919-06-17 | Alexander edwin gillespie | ||
US1840305A (en) * | 1928-07-13 | 1932-01-12 | Smith Corp A O | Oil refining still |
US1827437A (en) * | 1929-12-07 | 1931-10-13 | Alfred H Pascoe | Method of making reenforced drill pipe casings |
US1989614A (en) * | 1933-10-05 | 1935-01-29 | Texas Co | Corrosion resistant liner for tubular articles |
US2240021A (en) * | 1935-08-16 | 1941-04-29 | United States Steel Corp | Method of preventing wedge and contact corrosion of metals and alloys |
US2201862A (en) * | 1938-03-26 | 1940-05-21 | Heisterkamp Alex | Pipe coupling |
US2216033A (en) * | 1938-06-01 | 1940-09-24 | Kellogg M W Co | Method of forming lined connectors |
US2258563A (en) * | 1940-03-11 | 1941-10-07 | Armstrong | Process for making stainless clad pierced tubes |
US2303778A (en) * | 1941-02-06 | 1942-12-01 | Int Nickel Co | Soil pipe |
FR998495A (en) * | 1945-10-13 | 1952-01-18 | Stup Procedes Freyssinet | Pipe joints, particularly suitable for concrete pipes |
US2739828A (en) * | 1949-12-06 | 1956-03-27 | Flexonics Corp | Pipe connector with flexible material joint |
US2919936A (en) * | 1956-01-03 | 1960-01-05 | Curtiss Wright Corp | Metallic lined pipe coupling having a metallic seal |
US3077661A (en) * | 1958-03-28 | 1963-02-19 | Howard A Fromson | Method of making composite seamless tubing |
US3020068A (en) * | 1959-02-18 | 1962-02-06 | Victaulic Co Of America | Coupling of lined pipe and methods |
US3192612A (en) * | 1963-04-05 | 1965-07-06 | Phillips Petroleum Co | Method of constructing plastic-lined conduit |
US3307860A (en) * | 1965-01-15 | 1967-03-07 | Mobil Oil Corp | Joint for liner-carrying well pipe |
US3336054A (en) * | 1965-01-15 | 1967-08-15 | Mobil Oil Corp | Liner-carrying well pipe and joint |
US3758361A (en) * | 1970-11-16 | 1973-09-11 | J Hunter | Process for lining pipe joints |
US3843170A (en) * | 1971-07-09 | 1974-10-22 | L Bagnulo | Joints for conduits having a continuous corrosion-resistant lining |
US4026583A (en) * | 1975-04-28 | 1977-05-31 | Hydril Company | Stainless steel liner in oil well pipe |
US4288105A (en) * | 1979-02-21 | 1981-09-08 | Resistoflex Corporation | Pipe union with both pre-load dependent and independent seals |
US4366971A (en) * | 1980-09-17 | 1983-01-04 | Allegheny Ludlum Steel Corporation | Corrosion resistant tube assembly |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5028081A (en) * | 1987-06-05 | 1991-07-02 | Societe Nationale Elf Aquitaine | Connection for pipes of composite materials |
US5447339A (en) * | 1991-02-26 | 1995-09-05 | Philippe Marchal | Pipe for carrying fluids, particularly hydrocarbons |
US5660211A (en) * | 1992-01-06 | 1997-08-26 | Sumitomo Metal Industries | Galvanic corrosion resistant insulating pipe having excellent film adhesion |
US5437086A (en) * | 1993-09-09 | 1995-08-01 | Murphree; Pat D. | Method of fabricating a bi-metal pipe section |
US5653477A (en) * | 1994-12-14 | 1997-08-05 | Rohrback Cosasco Systems, Inc. | High pressure access fitting and method |
US5906400A (en) * | 1997-05-12 | 1999-05-25 | John Gandy Corporation | Galvanic corrosion protection system |
US6042153A (en) * | 1998-02-25 | 2000-03-28 | Grant Prideco, Inc. | Threaded connection for internally clad pipe |
US6273474B1 (en) * | 1998-02-25 | 2001-08-14 | Grant Prideco, L.P. | Threaded connection for internally clad pipe |
US6863313B1 (en) | 1998-02-25 | 2005-03-08 | Grant Prideco, L.P. | Threaded connection for internally clad pipe |
US6073332A (en) * | 1998-03-09 | 2000-06-13 | Turner; William C. | Corrosion resistant tubular system and method of manufacture thereof |
US20050212283A1 (en) * | 2004-03-26 | 2005-09-29 | Honeywell International Inc. | Low profile tension style flexible joint |
US7331612B2 (en) * | 2004-03-26 | 2008-02-19 | Honeywell International, Inc. | Low profile tension style flexible joint |
US20060071473A1 (en) * | 2004-10-05 | 2006-04-06 | Sivley Robert S Iv | Helical groove for a tubular connection |
US20070132237A1 (en) * | 2004-10-05 | 2007-06-14 | Hydril Company Lp | Helical groove for a tubular connection |
US7607333B2 (en) * | 2004-10-05 | 2009-10-27 | Hydril Llc | Helical groove for a tubular connection |
US20070187078A1 (en) * | 2005-12-21 | 2007-08-16 | Exxonmobil Research And Engineering Company | Insert and method for reducing fouling in a process stream |
US8286695B2 (en) * | 2005-12-21 | 2012-10-16 | Exxonmobil Research & Engineering Company | Insert and method for reducing fouling in a process stream |
US20070181296A1 (en) * | 2006-02-08 | 2007-08-09 | David Hall | Self-expandable Cylinder in a Downhole Tool |
US7350565B2 (en) | 2006-02-08 | 2008-04-01 | Hall David R | Self-expandable cylinder in a downhole tool |
US20110146049A1 (en) * | 2009-11-30 | 2011-06-23 | Howard Hagiya | Grooved-End Rubber Expansion Joint |
US8905440B2 (en) * | 2009-11-30 | 2014-12-09 | Howard Hagiya | Grooved-ended resilient expansion joint and method of resiliently joining together a pair of grooved-ended pipes |
US8672621B2 (en) | 2010-02-19 | 2014-03-18 | Dresser-Rand Company | Welded structural flats on cases to eliminate nozzles |
US20110206505A1 (en) * | 2010-02-19 | 2011-08-25 | Dresser-Rand Company | Welded structural flats on cases to eliminate nozzles |
US8595930B2 (en) | 2010-03-24 | 2013-12-03 | Dresser-Rand Company | Press-fitting corrosion resistant liners in nozzles and casings |
US20110232290A1 (en) * | 2010-03-24 | 2011-09-29 | Dresser-Rand Company | Press-fitting corrosion resistant liners in nozzles and casings |
US9828918B2 (en) | 2010-03-24 | 2017-11-28 | Dresser-Rand Company | Press-fitting corrosion resistant liners in nozzles and casings |
EP2823295A4 (en) * | 2012-03-05 | 2015-11-04 | Waters Technologies Corp | Corrosion protection in tubing used in chromatography |
US10232287B2 (en) | 2012-03-05 | 2019-03-19 | Waters Technologies Corporation | Corrosion protection in tubing used chromatography |
US20230194027A1 (en) * | 2021-12-16 | 2023-06-22 | B. & E. Manufacturing Co., Inc. | Dynamic Bellows Fluid Fitting |
US11767937B2 (en) * | 2021-12-16 | 2023-09-26 | B. & E. Manufacturing Co., Inc. | Dynamic bellows fluid fitting |
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Legal Events
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AS | Assignment |
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